Rockstar Games is extremely particular to their games. With Red Dead Redemption 2 releasing this year, we're pretty sure GTA VI isn't happening at least for the next few years.

Rockstar will once again expand the world of Grand Theft Auto Online next month with the launch of another new update - Los Santos: Nightclubs.
Due at some point in July, the free expansion will let you open and manage your own nightclub, customise its setup, look, staff and promotion, and fill it with real-life music acts Solomun, Tale Of Us, Dixon and The Black Madonna.
Here's a teaser:

Rockstar will once again expand the world of Grand Theft Auto Online next month with the launch of another new update - Los Santos: Nightclubs.
Due at some point in July, the free expansion will let you open and manage your own nightclub, customise its setup, look, staff and promotion, and fill it with real-life music acts Solomun, Tale Of Us, Dixon and The Black Madonna.
Here's a teaser: